LibGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, Mac OS X, Android, iOS and your WebGL enabled browser.

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LibGDX : Scene2D ScrollPane

I want to create a list of buttons with ScrollPane , but I cant create a ScrollPane . In the constructor method in the examples Skins are used (.atlas , .json files) but how to create these files? ...
8
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2answers
7k views

Repeat texture in libgdx

How to fill region with repeated texture? Now I'm using next method: spriteBatch.begin(); final int tWidth = texture.getWidth(); final int tHeight = texture.getHeight(); for (int i = 0; i < ...
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1answer
699 views

How to use the zoom gesture in libgdx?

I found the example code for the GestureListener class, but I don't understand the zoom method: private float initialScale = 1; public boolean zoom (float originalDistance, float currentDistance) { ...
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1answer
830 views

Multiple enemy array in LibGDX

I am trying to make a multiple enemy array, where every 30 secods a new bullet comes from a random point. And if the bullet is clicked it should disapear and a pop like an explosion should appear. And ...
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0answers
12 views

intersection coordination algorithm

I'm trying to create a 2D game where i have an a traffic intersection. My game object need to pass by the intersection without colliding with each other and without stoping them My question is ...
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3answers
297 views

Confused about using libGDX dispose()

Can anyone please help me to understand the proper use of the dispose(). Does dispose() get called automatically or do I have to make a call to it? In a game I'm writing, I use a texture atlas and ...
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2answers
705 views

Move Box2D body towards mouse click

In a top down game using Box2D, I would like the player's Box2D body to rotate towards the mouse click, and then move to a point on mouse click (move, not teleport). I have worked out the rotation ...
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1answer
52 views

Problems managing collision filtering

I have my character fixture and body(is a tank), so when I press the screen it throws a rocket(which also has a body and a fixture) that the player can controlll touching the screen. My game also has ...
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0answers
25 views

How can I draw multiple lines connected via “nodes” in libgdx Scene2D?

I have two Vectors which indicate the ending points of each line. I am trying to draw similar lines to football formation lines like these. My main problem using ShapeRenderer is: ShapeRenderer ...
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1answer
318 views

LibGDX: Colllisions between bullets and enemies in arrays

I am writing a "Gauntlet" style game. So far I have managed to successfully detect collisions between my player object and my ghost enemy objects, and when they collide they drain the player's energy. ...
3
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1answer
90 views

Custom Coloring of Tileset Characters

Games like Dwarft Fortress and Dungeon Crawl Stone Soup are drawing their boards using tiles from a tileset image (I think?). I know you can do color keying and replace the background color with ...
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1answer
115 views

LibGDX: How to detect remote button press for Android TV?

On Android TV, I need to be able to detect the remote control centre button to start the game. I tried: if (Gdx.input.justTouched() || Gdx.input.isKeyJustPressed(Input.Keys.SPACE) || ...
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2answers
627 views

Libgdx box2d crashing

im making a game in libgdx which i having a bunch of circle bodies floating around in space and when the player's body crashes into another body, that body deletes and creates two smaller bodies ...
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1answer
1k views

libgdx sprite position relative to body

Apologies if this is a reiteration, as I couldn't find another discussion of this over the past couple days. Issue: I'm using libgdx and box2d, and I'm currently updating the sprite's position to ...
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1answer
18 views

libgdx collision on moving Rectangle with other Rectangle

I'm making a soccer game where you touch the screen and the player shoot the ball to the touched position with the objective of scoring goals when it hits the goal. The player is just a Sprite and the ...
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1answer
34 views

How to rotate an image on touch using RotateToAction in libGDX?

I want to rotate my image on touch but it never applies action, I'm using RotateToAction to achieve this. class actorCark extends Actor { Texture texture; Sprite sprite; Global g; ...
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1answer
84 views

libGDX upload z-axis of sprite to graphics card

Background: I want to obtain each fragments position via vertex interpolation to then calculate the light vector for phong shading (L = [Fragment pos] - [light source pos]). Problem: At the moment I ...
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0answers
10 views

Unable to rotate an Actor using an Action in libgdx; what am I doing wrong?

I use this to add a rotate action to my actor: theme_button = new ThemeButton(theme); theme_button.setPosition(300, 300); theme_button.setSize(300, 300); ...
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0answers
14 views

libgdx - 2D Ball Box collision

I want to make the ball reflect when it touches the rectangle like in the picture below. The player can move the ball by moving his finger around the touchscreen and put the ball inside the box. After ...
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1answer
38 views

Libgdx: move img from one point to another?

I'm trying to make an image move towards another point. I only have the current X/Y and the destination X/Y + Speed. That's it. public void Draw(SpriteBatch batch, int goalX, int goalY){ destX = ...
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2answers
160 views

How do I induce collision events in LibGDX 3D?

In the code below I've put an example of something I want to do. I have the camera and I want it to stop moving whenever it hits one of the boxes, how do I do this? public class Main extends ...
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1answer
51 views

libGDX : Paint And Remove Color From Actor with touchDragged

I created two-dimensional array of Button actor, then I added new ClickListener() { touchDragged } as the following code: buttons = new Button[3][3]; for (int row = 0; row < buttons.length; ...
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1answer
301 views

LibGDX Box2D TileGame Efficiency

I am trying to implement Box2D into my top down tile game in LibGDX. Each world consists of a set of chunks, and each chunk is 16 tiles wide/long. The maximum/minimum chunks loaded at one time is 9 (a ...
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1answer
34 views

Shader only rendering 1/4th of the screen

I've asked the same question on SO here and they suggested I should ask here instead. I'm currently trying to create a gaussian blur shader, and while I've successfully created the blur effect my ...
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1answer
16 views

libgdx sprite placement

Im making a soccer game where you basically have to shoot the ball to the goal and the ball goes to where you touch the screen. Im having an issue with the ball though, when the ball spawns on the ...
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1answer
28 views

onHold input libGDX

I want to have onHold or onTouch input for my game. So as long as the user touches the screen something happens (a car moves) and when he stops touching the screen it stops. How do I do that? I want ...
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1answer
223 views

Rotating towards a point in Box2D

I'm using Box2d as my physics engine and I'm trying to solve what would normally be a simple problem but what has become a nightmare for me and preventing me from finishing my app. (6 months work) ...
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1answer
223 views

How to use Java 8 with Lib GDX in IntelliJ?

I have set the jdk to Java 8 and I have modified all the build.gradle files in my project to have sourceCompatibility = 1.8 instead of 1.6. My problem is that while it does work on Desktop it doesn't ...
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1answer
39 views

How to split a screen in half using LibGDX without scaling?

I am currently working on a racing game with libGDX and I need to split the screen in half for a two-players mode. (Player 1 in first half and Player 2 in second half). I already have Camera1 that ...
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1answer
93 views

Black screen when launching on phone

I am coding a game in libgdx. While adding the background I used the html module to watch the results fast and easy on my computer. But when I try to see it on my phone I just get a black screen. My ...
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2answers
311 views

Laggy empty project at 60FPS

@Override public void create() { batch = new SpriteBatch(); img = new Texture("badlogic.jpg"); } @Override public void render() { Gdx.gl.glClearColor(0, 0, 0, 1); ...
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2answers
230 views

How to achieve sprite reflection effect in libgdx

I am currently working on an open world game similar to Pokemon using libgdx. I am currently stuck on this effect that I really want to be done before moving to other features of my game. How can I ...
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1answer
90 views

Libgdx: Check collisions in Stage among actors

My goal is to check collisions among the actors that are in the Stage. My question is: is it necessary to maintain a list for each type of actor I have? Doing that I get 3 problems, 2 bad design ...
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1answer
253 views

libGDX new TextureAtlas(filename) and new Texture(filename) drawing stale image data

I'm trying to draw an image using libgdx but no matter what I do, libgdx seems to insist on drawing a portion of an image I had loaded and used in an earlier game screen. In my current game screen ...
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1answer
198 views

Sprites are rendered as black rectangles in android 4.0.x only

I have some problems rendering sprites correctly on a LG optimus vu (android version 4.0) with libgdx. Basically sprites are black rectangles, while other images that i declare as Texture are correct. ...
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1answer
31 views

Setting resizable to false in LibGDX

I have a small working game prototype. I want to do something like LwjglApplicationConfiguration cfg = new LwjglApplicationConfiguration(); cfg.resizable = false; But I get ...
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0answers
12 views

On touch input Libgdx [duplicate]

I want to have an on hold or on touch input for my game. So as long as the user touches the screen something happens (a car moves) and when he stops touching the screen it stops. How do I do that
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0answers
51 views

Implementing gesture detection in LibGdx

what I tried: public class PlayState extends State implements GestureDetector.GestureListener { private Protagonist bird; private Texture bg; GestureDetector gestureDetector; ...
3
votes
1answer
96 views

Scene2D Actor walking animation?

I used to extend my Player/Entity class with Sprite, that way I could create a walking animation using SetRegion and super(stilldown.getKeyFrame(0)); I've recently started porting everything over to ...
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1answer
37 views

Libgdx, actor touchlistener not working

public class Main extends ApplicationAdapter { SpriteBatch batch; OrthographicCamera camera; Stage stage; Image greyback; Image circle; private float width; private float height; @Override ...
3
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1answer
132 views

Creation of a tiled map editor polyline in box2d is not working correctly

I'm currently trying to create a box2d polyline object in my libgdx game, but it's not working as expected. To get a better picture of my subject, have a look at how it should look like, and how it ...
7
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2answers
2k views

SQLite in libGDX

Does anyone have an example of how I can use SQLite in libGDX? I have a class in my original Android code that allowed me to easily access a database but I can't seem to find anything equivalent to ...
6
votes
1answer
166 views

How to detect collision only in non-transparent texture?

I am developing a game using libgdx. I am trying to detect the collision between bee and tube. I am using the following code to detect the collision. if(player.getBounds().overlaps(boundsBot)){ } ...
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1answer
218 views

How to zoom and scroll in libGdx?

I am trying to both A.) Pinch zoom my game scene and B.) Move (scroll) my game scene but I have not found many examples. I learn more by examples than by reading API documentation (although I am ...
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2answers
74 views

Round position to center of current grid position

The title may not make sense, nor may the question - I'll try nevertheless. I'm attempting to make a game similar to The Powder Toy. Essentially, this is a physics simulation game, where the users ...
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0answers
117 views

Box2dMapObjectParser isometric map - bodies have wrong position and size

I'm using Box2dMapObjectParser to load Tiled objects layer onto my IsometricTiledMapRenderer'ed TiledMap. It works OK with a UnitScale of 1 but the position is wrong and some shapes have weird ...
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0answers
14 views

How do I increase or decrease the background movement speed (libgdx) [closed]

I making a game using libgdx and I want to know how to increase or decrease the background movement speed this is what i tried public class PlayState extends State { private int tubeSpacing = ...
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1answer
25 views

LibGDX: Transition scale bitmap font

I'm trying to create a Minecraft like quotes on the menu screen of my game. I'm using BitmapFont to draw the text on screen but i don't know how to make that scale up scale down effect. This is what ...
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1answer
56 views

How to handle two players playing on one keyboard with Box2D (LibGDX)?

I'm making a racing game with LibGDX and Box2D. I've been using this tutorial to implement the basic physics, and it works properly. My main problem is to implement two different sets of keys ...
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0answers
17 views

How to force libGDX to set display mode?

The following code represents my attempt to switch display modes. I've had to include the redundant setWindowedMode because without it, libGDX would not force the change required to reflect the ...